All categories

3 years ago

D.b. If Efx = 100 + 75x and N= 20 + 15x, find the mean.

Mathematics

1 answer:

Nady [450]3 years ago

7 0

Answer:

1)175 2)35

um belo dia abençoado

You might be interested in

If n = 5.3 cm and p = 6.25 cm, what is the measure of angle ?

vladimir1956 [14]

Answer:

Hope this helps can I get brainliest I need to rank up :))))

Step-by-step explanation:

32° ... If he is standing 15 feet from the base of the pole, about how tall is the.

8 0

3 years ago

Read 2 more answers

which functions have a range of all real numbers ? check all that apply. A. y=csc x B. y=sec x C. y=tan x D. y= cot x

Natalka [10]

None of these. All of these functions are defined as ratio of trigonometric functions.

Trigonometric functions have infinite zeroes, so when you put them in the denominator, they lead to infinitely many points of ill-definition.

Specifically, we have:

$\csc(x) = \dfrac{1}{\sin(x)}$

which is undefined at

$\sin(x)=0\iff x=k\pi, k\in\mathbb{Z}$

$\sec(x) = \dfrac{1}{\cos(x)}$

which is undefined at

$\cos(x)=0\iff x=\dfrac{\pi}{2}+k\pi, k\in\mathbb{Z}$

$\tan(x) = \dfrac{\sin(x)}{\cos(x)}$

which is undefined at

$\cos(x)=0\iff x=\dfrac{\pi}{2}+k\pi, k\in\mathbb{Z}$

$\cot(x) = \dfrac{\cos(x)}{\sin(x)}$

which is undefined at

$\sin(x)=0\iff x=k\pi, k\in\mathbb{Z}$

4 0

3 years ago

Suppose heights of seasonal pine saplings are normally distributed and have a known population standard deviation of 17 millimet

Mumz [18]

Answer:

$296.693\leq x\leq 319.307$

Step-by-step explanation:

The confidence interval for the population mean x can be calculated as:

$x'-z_{\alpha /2}\frac{s}{\sqrt{n} } \leq x\leq x'+z_{\alpha /2}\frac{s}{\sqrt{n} }$

Where x' is the sample mean, s is the population standard deviation, n is the sample size and $z_{\alpha /2}$ is the z-score that let a proportion of $\alpha /2$ on the right tail.

$\alpha$ is calculated as: 100%-99%=1%

So, $z_{\alpha/2}=z_{0.005}=2.576$

Finally, replacing the values of x' by 308, s by 17, n by 15 and $z_{\alpha /2}$ by 2.576, we get that the confidence interval is:

$308-2.576\frac{17}{\sqrt{15} } \leq x\leq 308+2.576\frac{17}{\sqrt{15} }\\308-11.307 \leq x\leq 308+11.307\\296.693\leq x\leq 319.307$

6 0

3 years ago

Quotient of 0.72 / 4

sasho [114]

Answer: The answer is 0.18

Step-by-step explanation:

I took the test

5 0

3 years ago

Find the area of this semi-circle with radius, r = 66cm. Give your answer rounded to 1 DP.

Darya [45]

Answer:

414.857143

Step-by-step explanation:

r=66

=2*66*22/7

=414.857143

4 0

2 years ago

D.b. If Efx = 100 + 75x and N= 20 + 15x, find the mean.​

D.b. If Efx = 100 + 75x and N= 20 + 15x, find the mean.